CN212708699U

CN212708699U - Metal product and die assembly thereof

Info

Publication number: CN212708699U
Application number: CN202021348466.8U
Authority: CN
Inventors: 刘佩婷; 蔡旗龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-16
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a metal product and mould subassembly thereof, metal product includes: the metal body is uniformly divided into a plurality of sub-metal blocks in a preset shape, and the plurality of sub-metal blocks are in an array shape; adjacent sub-metal blocks are connected, and a first V-shaped groove is formed at the joint of the adjacent sub-metal blocks; wherein, the first V-shaped groove is provided with a sharp angle and a calibrated form. The utility model obtains the metal product through the primary mould pressing rapid forming and the secondary mould pressing fine forming; the defects that the traditional small-micro-weight noble metal investment product is high in production cost and a large-weight product is inconvenient to use after sale are overcome, the production efficiency of the small noble metal product is greatly improved through technical innovation, and the error loss cost is accurately controlled.

Description

Metal product and die assembly thereof

Technical Field

The utility model relates to a metal product field especially relates to a metal product and mould assembly thereof.

Background

With the deepening of the internet era and the influence of social trends such as the replacement and development of consumers, the mass investment/consumption is more and more prone to be small in volume, fragmented and popularized. As is known, precious metals have strong investment and value-preserving values, while traditional precious metal investment products in the current market mostly take the forms of fixed bars, coins, stamps and the like as main parts, and most of the products with relatively high investment value-preserving values are products with relatively high weight, but the investment products with relatively high weight have higher purchase thresholds, cannot meet the requirements of more extensive popular small micro-investment, are very inconvenient to use after sale, can only be wholly purchased and used, cannot meet the practical scattered requirements of purchasing or exchanging jewelry in different times and the like, and the precious metal products with relatively low weight are influenced by the traditional technology, have high construction costs, lose the investment value-preserving values of the precious metals, and thus the market development of the precious metal investment products is severely limited.

Since the precious metal is expensive in material, the market is mainly based on the price per gram, the material loss needs to be strictly controlled in the production process, and the current production technology is mainly realized by a manual weight balancing mode, the more accurate the weight is, the less the material loss is, but the higher the time and labor cost is, for example, the production process and the labor cost are basically similar when a single bar of 1 kg and a bar of 1g are produced, therefore, the larger the weight is, the lower the production cost and the loss cost per gram are distributed, the smaller the weight is, the higher the production cost and the loss cost per gram are distributed, the smaller the additional price is, the higher the investment value is, the smaller the investment value of the precious metal product is, and the smaller the additional price is, so that the market urgently needs a small precious metal investment product which is small in weight, low in cost and convenient to use to meet the investment and purchase requirements of the public.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the embodiment of the utility model provides a metal product and mould subassembly thereof is provided. The metal product utilizes the stress concentration principle in material mechanics, and the extremely precise V-shaped sharp-angled groove is arranged on the metal product as a stress concentration position, so that the metal block is broken and divided into small blocks when being subjected to smaller external force, the more precise the vertex angle of the V-shaped sharp-angled groove is, the more precise the stress concentration position is, the higher the division precision is, the less the material loss is, and the lower the cost is. The die assembly has both high efficiency and high precision; the primary rapid forming die is provided with a fillet cutting edge of 60-150 degrees, so that the die cutting edge can be protected from being broken, damaged and deformed during high-gravity and high-efficiency extrusion operation to influence the processing precision and efficiency, the service life and the precision of the die are improved, and a standard primary semi-finished product can be manufactured with high efficiency and low cost; the secondary fine forming die is provided with a support pillar, a precise sharp-corner cutting edge and a fine texture or image-text mark, so that the service life and the precision of the precise die are improved, the metal product is manufactured at high efficiency and low cost, compared with the traditional production technology and products, the secondary fine forming die mainly aims to solve the problems that the traditional small-weight metal investment product is high in production cost and the heavy-weight product is inconvenient to use after sale, the production efficiency of the small and precious metal product is greatly improved through technical innovation, and the error loss cost is precisely controlled.

A first aspect of the embodiments of the present invention provides a metal product, which includes:

the metal body is uniformly divided into a plurality of sub-metal blocks in a preset shape, and the plurality of sub-metal blocks are in an array shape;

adjacent sub-metal blocks are connected, and a first V-shaped groove is formed at the joint of the adjacent sub-metal blocks;

wherein, the first V-shaped groove is provided with a sharp angle and a calibrated form.

Optionally, the vertex angle of the first V-shaped groove is a sharp angle, and the precision of the sharp angle of the first V-shaped groove is greater than or equal to 0.005mm and less than or equal to 0.02 mm; and/or the presence of a gas in the gas,

the vertex angle bisector of the first V-shaped groove is perpendicular to the bottom surface of the sub-metal block, and the vertex angle of the first V-shaped groove is larger than 60 degrees and smaller than or equal to 150 degrees; and/or the presence of a gas in the gas,

the opening width of the first V-shaped groove is greater than or equal to the depth of the first V-shaped groove; and/or the presence of a gas in the gas,

and the vertical distance from the top point of the first V-shaped groove to the bottom surface of the sub metal block is greater than or equal to 0.1mm and less than or equal to 0.3 mm. Optionally, the shapes of the plurality of sub-metal blocks are the same.

Optionally, the shape of the sub-metal block is rectangular, diamond, or triangular.

Optionally, the sub-metal blocks on two sides of the first V-shaped groove are forced to divide the adjacent sub-metal blocks along the first V-shaped groove, and the error between the weight of the divided sub-metal blocks and the nominal weight is less than or equal to +0.01g and greater than or equal to-0.01 g.

Optionally, a second V-shaped groove is formed on the other side of the joint of adjacent sub-metal blocks, the vertex angle of the second V-shaped groove is a sharp angle, and the precision of the sharp angle of the second V-shaped groove is greater than or equal to 0.005mm and less than or equal to 0.02 mm;

and the vertex angle of the first V-shaped groove is opposite to the vertex angle of the second V-shaped groove.

Optionally, the depth of the first V-shaped groove is greater than the depth of the second V-shaped groove; and/or

The vertex angle of the second V-shaped groove is greater than 60 degrees and less than or equal to 150 degrees; and/or the presence of a gas in the gas,

the distance between the top point of the first V-shaped groove and the top point of the second V-shaped groove is greater than or equal to 0.1mm and smaller than or equal to 0.3 mm.

Optionally, at least one side of each sub-metal block is provided with texture or graphic print.

Optionally, both sides of each sub-metal block are respectively provided with texture or graphic and text imprints.

Optionally, the metal product is made of a noble metal.

A second aspect of embodiments of the present invention provides a die assembly for manufacturing the metal product of the first aspect, the die assembly including a primary rapid prototyping cutting die and a secondary fine prototyping cutting module;

the primary rapid forming and cutting die comprises a die frame, and a first press die and a second press die which are arranged on the die frame, wherein at least one of the first press die and the second press die is arranged on the die frame in a sliding manner, the first press die and the second press die are matched to form the primary forming bin, one side of the first press die, facing the second press die, is provided with a plurality of first cutting edges which are arranged at intervals, the first cutting edges are conical and are positioned in the primary forming bin, the top of each first cutting edge is a fillet, the height of each first cutting edge is smaller than the thickness of the metal sheet, and the width of one side, close to the first press die, of each first cutting edge is larger than the height of each first cutting edge;

the secondary fine forming cutting die comprises a third pressing die and a fourth pressing die which are matched with each other, the third pressing die and the fourth pressing die are matched to form the secondary forming bin, one side of the fourth press-fit die facing the third press-fit die is provided with a plurality of second cutting edges which are arranged at intervals, the number of the second cutting edges is equal to that of the first cutting edges, the second cutting edges are conical and are positioned in the secondary forming bin, the top of the second cutting edge is a sharp angle, the precision of the sharp angle of the second cutting edge is more than or equal to 0.005mm, and is less than or equal to 0.02mm, the taper angle of the second cutting edge is equal to the taper angle of the first cutting edge, the width of one side of the second cutting edge close to the fourth press fit die is equal to the width of one side of the first cutting edge close to the first press fit die, the width of one side, close to the fourth press fit die, of the second cutting edge is greater than the height of the second cutting edge;

when a metal sheet with a smooth surface is placed in a primary forming bin of a primary rapid forming cutting die and extruded, the first cutting edge can extrude the metal sheet, so that a primary V-shaped groove is formed in one side of the metal sheet, and a primary semi-finished product is obtained;

when the primary semi-finished product is placed into a secondary forming bin of a secondary fine forming and cutting module and extruded, the plurality of primary V-shaped grooves in the primary semi-finished product are correspondingly extruded by the plurality of second cutting edges, so that the plurality of primary V-shaped grooves in the primary semi-finished product form first V-shaped grooves of the metal product.

Optionally, the plurality of first cutting edges are uniformly arranged at intervals on one side of the first pressing die facing the second pressing die, and the plurality of second cutting edges are uniformly arranged at intervals on one side of the fourth pressing die facing the third pressing die.

Optionally, the taper angle of the first cutting edge is greater than 60 degrees and less than or equal to 150 degrees.

Optionally, the vertex of the second cutting edge is lower than the side surface of the fourth press mold, the distance between the vertex of the second cutting edge and the side surface of the fourth press mold is greater than or equal to 0.1mm and less than or equal to 0.3mm, the side surface of the fourth press mold is in abutting fit with the side surface of the third press mold, and the secondary molding chamber is formed between the side of the fourth press mold and the side of the third press mold.

Optionally, a plurality of third cutting edges arranged at intervals are arranged on one side, facing the fourth press-fit die, of the third press-fit die, the number of the third cutting edges is equal to that of the second cutting edges, the third cutting edges are conical and are located in the secondary forming bin, the vertex angles of the third cutting edges are sharp angles, the vertex angles of the third cutting edges are opposite to that of the second cutting edges, and the cone angles of the third cutting edges are equal to that of the second cutting edges;

and when the primary semi-finished product is placed in a secondary forming bin of a secondary fine forming and cutting module and extruded, the third cutting edge correspondingly extrudes one side of the primary semi-finished product, which is deviated from the primary V-shaped groove, so that a second V-shaped groove of the metal product is formed on the primary semi-finished product.

Optionally, the height of the third cutting edge is lower than the height of the second cutting edge; and/or the presence of a gas in the gas,

the plurality of third cutting edges are uniformly distributed at intervals on one side of the third pressing die, which faces the fourth pressing die; and/or the presence of a gas in the gas,

the third cutting edge has a taper angle greater than 60 degrees and less than or equal to 150 degrees.

Optionally, a side of the third press mold facing the fourth press mold and/or a side of the fourth press mold facing the third press mold are provided with a plurality of texture or image-text print forming portions, and one texture or image-text print forming portion is respectively provided between adjacent second cutting edges and/or between adjacent third cutting edges.

Optionally, a plurality of texture or image-text print forming portions are respectively arranged on one side of the third pressing die facing the fourth pressing die and one side of the fourth pressing die facing the third pressing die;

the texture or graphic print forming part can extrude the primary semi-finished product, so that the two side surfaces of the primary semi-finished product respectively form the texture or graphic print of the metal product.

Optionally, the metal sheet is made of a noble metal.

The embodiment of the utility model provides an among the technical scheme, junction through at adjacent son metal block sets up first V type groove, and first V type groove is equipped with closed angle and demarcation pattern, so, can cut apart adjacent son metal block along first V type groove more easily, and realized accurate division, the son metal block of being cut apart has extremely accurate weight, with weight error control in lower within range, overcome traditional small weight metal investment product manufacturing cost expensive and the big weight product shortcoming of using inconvenient after sale, the production efficiency of small and tiny metal block has been improved by a wide margin, and accurate control error loss cost.

Drawings

Fig. 1 is a schematic structural diagram of a metal product according to an embodiment of the present invention;

fig. 2A is a side view of a metal article according to an embodiment of the present invention;

fig. 2B is a side view of a metal article according to another embodiment of the present invention; fig. 3 is a schematic flow chart of a metal product according to an embodiment of the present invention;

fig. 4A is a schematic view illustrating a metal sheet processed by a primary rapid prototyping cutting die according to an embodiment of the present invention;

fig. 4B is a schematic structural diagram of a primary semi-finished product according to an embodiment of the present invention;

fig. 5A is a schematic view illustrating a secondary fine forming cutting die for processing a primary semi-finished product according to an embodiment of the present invention;

fig. 5B is a schematic diagram of the secondary fine forming cutting die for processing the primary semi-finished product according to another embodiment of the present invention.

Reference numerals:

1: a metal body; 11; a sub-metal block; 12: a first V-shaped groove; 13: a second V-shaped groove; 14: texture or graphic imprinting;

10: a metal sheet; 20: primary semi-finished products; 21: a primary V-shaped groove; 30: a second semi-finished product;

100: primarily and rapidly forming a cutting die; 110: a mold frame; 120: a first press mold; 130: second pressing and assembling the die; 140: a primary forming bin; 150: a first cutting edge;

200: secondary fine forming and cutting die; 210: thirdly, die pressing; 220: fourth pressing and assembling the die; 230: a secondary forming bin; 240: a second cutting edge; 250: a third cutting edge; 260: a texture or graphic print forming part; 270: a side surface of the fourth press mold.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that the following embodiments may be combined without conflict.

Referring to fig. 1 and fig. 2A, an embodiment of the present invention provides a metal product, which may include a metal body 1, wherein the metal body 1 is uniformly divided into a plurality of sub-metal blocks 11 in a predetermined shape, the predetermined shape is a precise shape, the plurality of sub-metal blocks 11 are in an array shape, and exemplarily, the plurality of sub-metal blocks 11 are arranged in a row or a column; illustratively, the plurality of sub-metal blocks 11 are arranged in a plurality of rows and columns, such as two rows and two columns, three rows and two columns, or other row numbers and column numbers.

Further, adjacent sub-metal blocks 11 are connected, and a first V-shaped groove 12 is formed at the connection position of the adjacent sub-metal blocks 11.

Wherein the first V-groove 12 is provided with a precise sharp angle and a calibrated profile.

The utility model discloses metal product, one side through the junction at adjacent sub-metal block 11 sets up first V type groove 12, and first V type groove 12 is equipped with accurate closed angle and the form of demarcation (predetermine the form promptly), so, realized accurate cutting apart, the sub-metal block 11 of being cut apart out has extremely accurate weight, weight error satisfies the expectation, overcome that traditional light weight metal investment product manufacturing cost is expensive and big weight product uses inconvenient shortcoming after sale, the production efficiency of sub-metal block 11 and extremely accurate control allowances material loss cost have been improved by a wide margin.

By utilizing the stress concentration principle in material mechanics, an extremely precise first V-shaped groove 12 is arranged between each sub-metal block 11 in the metal body 1 as a stress concentration position, so that the large metal body 1 is broken and divided into small sub-metal blocks 11 when the stress reaches the maximum value under the action of external force, and because the vertex angle of the first V-shaped groove 12 is a precise sharp angle, the more precise the stress concentration position is, the higher the division precision is, the less the material loss is, and the lower the cost is.

In this embodiment, since the plurality of sub-metal blocks 11 are formed on the same metal body 1, and the thicknesses of the metal body 1 are the same at all locations, the thicknesses of the plurality of sub-metal blocks 11 are completely the same.

Optionally, the top angle of the first V-groove 12 is a precise sharp angle, and the precision of the sharp angle of the first V-groove 12 is greater than or equal to 0.005mm and less than or equal to 0.02 mm.

Optionally, a bisector of a vertex angle of the first V-shaped groove 12 is perpendicular to the bottom surface of the sub metal block 11, and the vertex angle of the first V-shaped groove 12 is greater than 60 degrees and less than or equal to 150 degrees. Illustratively, the apex angle of the first V-groove 12 is 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, or other angular dimension greater than 60 degrees and less than 150 degrees.

Optionally, the width of the opening of the first V-shaped groove 12 is greater than the depth of the first V-shaped groove 12. It should be noted that, in the embodiment of the present invention, the opening of the first V-shaped groove 12 is the outermost opening of the first V-shaped groove 12, and the width of the opening of the first V-shaped groove 12 is the maximum width of the first V-shaped groove 12.

Optionally, the vertical distance from the vertex of the first V-shaped groove 12 to the bottom surface of the sub metal block 11 is greater than or equal to 0.1mm and less than or equal to 0.3 mm.

Optionally, the adjacent sub-metal blocks 11 are symmetrical with respect to the corresponding first V-shaped groove 12 (i.e., the first V-shaped groove 12 formed at one side of the joint of the adjacent sub-metal blocks 11), and the weight error of the plurality of sub-metal blocks 11 is less than or equal to +0.01g and greater than or equal to-0.01 g, so as to achieve accurate weight division.

Optionally, the shapes of the plurality of sub-metal blocks 11 are the same, and the shape of the sub-metal block 11 may be a square, such as a rectangle or a square, or may be other regular shapes, such as a parallelogram or a rhombus or a triangle.

Illustratively, in some embodiments, each sub-metal block 11 has the same weight and the same shape, so that the shapes and the weights of the divided sub-metal blocks 11 are identical, and the divided sub-metal blocks 11 have the extremely accurate weights, and the weight error meets the expectation.

Of course, the shapes of the plurality of sub-metal blocks 11 may be partially the same and partially different, and correspondingly, the weights of the plurality of sub-metal blocks 11 are also partially the same and partially different. Illustratively, the plurality of sub-metal blocks 11 are arranged in ten rows and ten columns, the shapes and weights of the sub-metal blocks 11 in each row are the same, and the shapes and weights of the metal blocks 11 in different rows are different; or the shapes and weights of the sub-metal blocks 11 in each row are the same, and the shapes and weights of the metal blocks 11 in different rows are different.

The embodiment of the utility model provides an in, to the sub-metal piece application of force of 12 both sides in first V type groove, can separate adjacent sub-metal piece 11 accurate segmentation. The sub-metal blocks 11 having accurate weight and size can be divided by applying force to the sub-metal blocks on both sides of the first V-shaped groove 12 using a simple tool or manually. The error between the weight of the divided sub-metal block 11 and the calibration weight (the size of which can be preset according to needs) is less than or equal to +0.01g and greater than or equal to-0.01 g.

Further, referring to fig. 2B, in some embodiments, a second V-shaped groove 13 is formed on the other side of the joint of the adjacent sub-metal blocks 11, that is, a first V-shaped groove 12 and a second V-shaped groove 13 are respectively formed on the two sides of the joint of the adjacent sub-metal blocks 11. The vertex angle of the second V-shaped groove 13 is a precise vertex angle, the precision of the vertex angle of the second V-shaped groove 13 is more than or equal to 0.005mm and less than or equal to 0.02mm, and the vertex angle of the first V-shaped groove 12 is just opposite to the vertex angle of the second V-shaped groove 13. The second V-shaped groove 13 is added, force can be applied along the first V-shaped groove 12 and the second V-shaped groove 13, so that adjacent sub-metal blocks can be easily separated, the force required for separating the adjacent sub-metal blocks can be smaller, and therefore the adjacent sub-metal blocks can be more easily separated.

In this embodiment, the depth of the first V-shaped groove 12 is greater than the depth of the second V-shaped groove 13, and the second V-shaped groove 13 has a function of assisting in dividing.

In the embodiment of the utility model provides an in, the degree of depth that the open-ended width in second V type groove 13 is greater than or equal to second V type groove 13.

The bisector of the vertex angle of the second V-shaped groove 13 is perpendicular to the bottom surface of the metal sub-block 11, and further, in some embodiments, the vertex angle of the second V-shaped groove 13 is greater than 60 degrees and less than or equal to 150 degrees, and the vertex angle of the second V-shaped groove 13 is, for example, 65 degrees 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees or other angular magnitudes greater than 60 degrees and less than 150 degrees.

After the metal product is divided along the sub-metal blocks 11 on the two sides of the first V-shaped groove 12 and the second V-shaped groove 13, a plurality of separated sub-metal blocks 11 can be obtained, and the structures and the weights of the plurality of divided metal blocks are all the same, so that accurate division is realized.

Optionally, the distance between the vertex of the first V-shaped groove 12 and the vertex of the second V-shaped groove 13 is greater than or equal to 0.1mm and less than or equal to 0.3mm, and illustratively, the distance between the vertex of the first V-shaped groove 12 and the vertex of the second V-shaped groove 13 is 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, or other values greater than 0.1mm and less than 0.3mm, so that the sub-metal blocks 11 with precise weight and size can be separated by using a simple tool or manual operation.

In the embodiment of the utility model, first V type groove 12, second V type groove 13 are symmetrical structure.

Further, referring to fig. 2A and 2B, in some embodiments, at least one side of each sub-metal block 11 is provided with a texture or graphic print 14, and the texture or graphic print 14 can indicate information of the sub-metal block 11 and can make the sub-metal block 11 more beautiful. The texture or graphic print 14 may include a recessed and/or raised structure to form a pattern, such as a relief pattern, that can indicate the logo, the weight of the sub-metal pieces 11, the color-forming print of the sub-metal pieces 11, and the like.

Illustratively, the two sides of each sub-metal block 11 are respectively provided with texture or graphic print 14, optionally, the texture or graphic print 14 on the two sides of each sub-metal block 11 is symmetrical, that is, the content indicated by the texture or graphic print 14 on the two sides of each sub-metal block 11 is the same, so as to further improve the aesthetic property of the sub-metal block 11; optionally, the textures or the text imprints 14 on the two sides of each sub-metal block 11 indicate different contents, and the textures or the text imprints 14 on the two sides of each sub-metal block 11 may be designed according to requirements.

The metal product of the embodiment of the utility model is made of noble metal, such as gold, silver or other noble metals; it is to be understood that the metal sheet 10 is not limited to noble metals, but may be other metals.

Referring to fig. 4A, the primary rapid prototyping cutting die 100 may include a die frame 110, and a first press mold 120 and a second press mold 130 disposed on the die frame 110, wherein at least one of the first press mold 120 and the second press mold 130 is slidably disposed on the die frame 110, and optionally, the first press mold 120 is slidably disposed on the die frame 110; optionally, the second press mold 130 is slidably disposed on the mold frame 110; optionally, the first press mold 120 and the second press mold 130 are slidably disposed on the mold frame 110. The first and second press dies 120, 130 cooperate to form a primary molding box 140, and in this embodiment, the first and second press dies 120, 130 are relatively movable to change the size of the primary molding box 140. In the embodiment of the present invention, the primary forming chamber 140 is a closed chamber.

The first press-fit mold 120 and the second press-fit mold 130 are in a vertical fit manner, the first press-fit mold 120 can slide up and down relative to the second press-fit mold 130, and exemplarily, the first press-fit mold 120 is an upper mold, and the second press-fit mold 130 is a lower mold; illustratively, the first press mold 120 is a lower mold and the second press mold 130 is an upper mold. Of course, the first press mold 120 and the second press mold 130 may also adopt other matching manners in other directions, such as a left-right matching manner, the first press mold 120 can slide left and right relative to the second press mold 130, and exemplarily, the first press mold 120 is a left mold, and the second press mold 130 is a right mold.

When the first press mold 120 and the second press mold 130 are in the vertical engagement type, the thickness direction of the metal sheet 10 is parallel to the vertical direction when the metal sheet 10 is placed in the primary molding bin 140; when the first press mold 120 and the second press mold 130 are of the right-left engagement type, the thickness direction of the metal sheet 10 is parallel to the right-left direction when the metal sheet 10 is placed in the primary molding bin 140.

Further, a plurality of first cutting edges 150 arranged at intervals are arranged on one side of the first press-fit mold 120 facing the second press-fit mold 130, the first cutting edges 150 are conical and are located in the primary molding bin 140, the top of the first cutting edges 150 is a rounded corner, and the height of the first cutting edges 150 is smaller than the thickness of the metal sheet 10. In this embodiment, the width of the first cutting edge 150 on the side close to the first press mold 120 is greater than the height of the first cutting edge 150.

Referring to fig. 4A and 4B, the process of processing the metal sheet 10 by the primary rapid prototyping cutting die 100 may include: the metal sheet 10 having a flat surface is put into the primary molding bin 140 of the primary rapid prototyping cutting die 100, and the movement of the first press die 120 toward the second press die 130 is controlled so that the first cutting ridge 150 presses the metal sheet 10, thereby forming the primary V-groove 21 at one side of the metal sheet 10. It will be appreciated that the primary V-groove 21 is a rounded-top V-groove, and since the width of the first cutting edge 150 on the side close to the first press mold 120 is greater than the height of the first cutting edge 150, the opening width of the primary V-groove 21 is greater than the depth of the primary V-groove 21.

Illustratively, the large-tonnage and precise extrusion molding of the first and second press-molding dies 120 and 130 is performed by using a large-tonnage four-column oil press, so that the noble metal sheet 10 is fully extruded and flowed in the closed primary molding bin 140, and a row of block-shaped primary semi-finished products 20 with a calibrated shape and thickness are rapidly and precisely formed, wherein the primary semi-finished products 20 are divided into a plurality of small blocks, and primary V-shaped grooves 21 are formed among the small blocks.

Referring to fig. 5A, the secondary fine-molding cutting die 200 may include a third press mold 210 and a fourth press mold 220 that are matched with each other, the third press mold 210 and the fourth press mold 220 cooperate to form a secondary molding chamber 230, and the third press mold 210 and the fourth press mold 220 can move relative to each other to change the size of the secondary molding chamber 230. Optionally, the precision of the secondary fine forming cutting die 200 is ± 2 μm, so as to meet the requirement of machining precision.

The third press-fit mold 210 and the fourth press-fit mold 220 are in a vertical fit manner, the third press-fit mold 210 can slide vertically relative to the fourth press-fit mold 220, and exemplarily, the third press-fit mold 210 is an upper mold, and the fourth press-fit mold 220 is a lower mold; illustratively, the third press mold 210 is a lower mold and the fourth press mold 220 is an upper mold. Of course, the third press mold 210 and the fourth press mold 220 may be engaged in other directions, such as a left-right engagement, in which the third press mold 210 can slide left and right relative to the fourth press mold 220, and the third press mold 210 is a left mold and the fourth press mold 220 is a right mold.

When the third press mold 210 and the fourth press mold 220 are in the vertical fit type, the thickness direction of the metal sheet 10 is parallel to the vertical direction when the metal sheet 10 is placed in the primary molding bin 140; when the third press mold 210 and the fourth press mold 220 are of the right-left engagement type, the thickness direction of the metal sheet 10 is parallel to the right-left direction when the metal sheet 10 is placed in the primary molding bin 140. Further, a plurality of second cutting edges 240 arranged at intervals are arranged on one side of the fourth press-fit die 220 facing the third press-fit die 210, wherein the number of the second cutting edges 240 is equal to that of the first cutting edges 150, the second cutting edges 240 are tapered, the tops of the second cutting edges 240 are all precise sharp corners, the precision of the sharp corners of the second cutting edges 240 is greater than or equal to 0.005mm and less than or equal to 0.02mm, and the second cutting edges 240 are located in the secondary molding bin 230. The taper angle of the second cutting ridge 240 is equal to the taper angle of the first cutting ridge 150, the width of the side of the second cutting ridge 240 close to the fourth press mold 220 is equal to the width of the side of the first cutting ridge 150 close to the first press mold 120, and the width of the side of the second cutting ridge 240 close to the fourth press mold 220 is greater than the height of the second cutting ridge 240.

Referring to fig. 2A and 5A, the process of processing the primary semi-finished product 20 by the secondary fine forming cutting die 200 may include: the primary semi-finished product 20 is placed into the secondary forming bin 230, so that the plurality of primary V-shaped grooves 21 are aligned with the plurality of second cutting edges 240, the third press-fit die 210 is press-fit onto the fourth press-fit die 220, so that the plurality of second cutting edges 240 correspondingly extrude the plurality of primary V-shaped grooves 21 on the primary semi-finished product 20, so that the plurality of primary V-shaped grooves 21 on the primary semi-finished product 20 form the first V-shaped grooves 12 of the metal product, that is, the primary V-shaped grooves 21 are precisely machined through the second cutting edges 240, so that the primary V-shaped grooves 21 are changed from round corners into precise sharp corners.

Illustratively, the third press mold 210 and the fourth press mold 220 are slightly pressed by a four-column oil press with uniform small gravity, and the surface of the primary semi-finished product 20 is finely micro-processed, so that the primary V-shaped groove 21 of the primary semi-finished product 20 becomes the first V-shaped groove 12 with extremely fine, and the metal product is obtained.

Optionally, the fourth platen 220 includes a first groove, and when the third platen 210 is mated with the fourth platen 220, the third platen 210 covers the first groove to form the secondary molding silo 230. By providing the first recess, it is convenient to put in the elementary semi-finished product 20. Optionally, the thickness of the metal sheet 10 is larger than the depth of the first groove. Of course, in other embodiments, the thickness of the metal sheet 10 may also be less than or equal to the depth of the first groove.

Optionally, the third press mold 210 includes a second groove, and when the third press mold 210 is mated with the fourth press mold 220, the first groove and the second groove form the secondary molding cartridge 230. It should be understood that the third press mold 210 may not be provided with a second groove.

The structures and the weights of the sub metal blocks 11 obtained by dividing the metal product obtained by the processing along the first V-shaped groove 12 are the same, or the structures of the sub metal blocks 11 are at least partially different.

Optionally, the plurality of first cutting edges 150 are uniformly spaced at a side of the first press mold 120 facing the second press mold 130, and the plurality of second cutting edges 240 are uniformly spaced at a side of the fourth press mold 220 facing the third press mold 210, so that the structures and weights of the sub-metal blocks 11 obtained by dividing the processed metal product along the first V-shaped groove 12 are the same.

Optionally, the taper angle of the first cutting edge 150 is greater than 60 degrees and less than or equal to 150 degrees, for example, the taper angle of the first cutting edge 150 is 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees or other angles greater than 60 degrees and less than 150 degrees, so as to protect the first cutting edge 150 from being broken, damaged and deformed during a high-gravity and high-efficiency extrusion operation to affect the processing precision and efficiency, so as to improve the service life and precision of the initial rapid prototyping cutting die 100, greatly improve the production efficiency, and reduce the production cost. Further alternatively, the taper angle of the second cutting ridge 240 is equal to the taper angle of the first cutting ridge 150.

Further, referring to fig. 5A again, the vertex of the second cutting edge 240 is lower than the side surface 270 of the fourth press-fit die, and the distance between the vertex of the second cutting edge 240 and the side surface 270 of the fourth press-fit die is greater than or equal to 0.1mm and less than or equal to 0.3mm, so that after the primary V-shaped groove 21 is processed by the second cutting edge 240, the primary semi-finished product 20 is not completely cut off, and it is more favorable to protect the second cutting edge 240 from being directly contacted with the opposite third press-fit die 210 during the operation process to cause the breakage, damage and deformation of the sharp corner of the second cutting edge 240 to affect the processing precision, and the secondary fine-molding cutting die 200 uses hard alloy with high hardness and wear resistance as the die material, so as to greatly improve the service life and yield of the die, and further reduce the production cost.

Illustratively, referring to fig. 5A, a fourth nip side surface 270 is in abutting engagement with the third nip 210, and an overmold cartridge 230 is formed between the side of the fourth nip 220 and the third nip 210.

Optionally, a side portion is provided at the edge of the fourth press mold 220, and the height of the side portion is the same as the thickness of the metal product, so as to protect the primary semi-finished product 20 from being excessively extruded during the secondary fine molding.

In some embodiments, referring to fig. 5B, a plurality of third cutting edges 250 are disposed at intervals on one side of the third press-fit mold 210 facing the fourth press-fit mold 220, the number of the third cutting edges 250 is equal to the number of the second cutting edges 240, the third cutting edges 250 are tapered and located in the secondary molding bin 230, the vertex angle of the third cutting edge 250 is a precise sharp angle, the vertex angle of the third cutting edge 250 is a sharp angle with a precision of greater than or equal to 0.005mm and less than or equal to 0.02mm, the vertex angle of the third cutting edge 250 is opposite to the vertex angle of the second cutting edge 240, the taper angle of the third cutting edge 250 is equal to the taper angle of the second cutting edge 240, and the third cutting edge 250 correspondingly extrudes one side of the preliminary half-finished product 20 away from the preliminary V-shaped groove 21, so that the second V-shaped groove 13 of the metal product is formed on the preliminary half-finished product 20.

As a further alternative, the height of the third cutting edge 250 is lower than the height of the second cutting edge 240, so that the second V-shaped groove 13 formed on the preliminary product 20 by the second cutting edge 240 has a function of assisting in dividing.

Accordingly, in order to make the structure and the weight of each metal sub-block obtained by dividing the processed metal product the same, a plurality of third cutting edges 250 are uniformly arranged at intervals on the side of the third press mold 210 facing the fourth press mold 220.

Optionally, the taper angle of the third cutting ridge 250 is greater than 60 degrees and less than or equal to 150 degrees, and illustratively, the taper angle of the third cutting ridge 250 is greater than 65 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, or other angular magnitudes greater than 60 degrees and less than 150 degrees.

The width of the third cutting edge 250 on the side close to the third press mold 210 may be smaller than the height of the third cutting edge 250, and the width of the third cutting edge 250 on the side close to the third press mold 210 may also be substantially equal to the height of the third cutting edge 250.

It is understood that the first cutting edge 150, the second cutting edge 240, the third cutting edge 250 and the fourth cutting edge are all convex structures, and the first cutting edge 150, the second cutting edge 240 and the third cutting edge 250 are all symmetrical structures.

Further, referring to fig. 5A again, a side of the third press mold 210 facing the fourth press mold 220 and/or a side of the fourth press mold 220 facing the third press mold 210 are provided with a plurality of texture or image-text print forming portions 260, and a texture or image-text print forming portion 260 is provided between adjacent second cutting edges 240. The texture or graphic mark forming part 260 can press the preliminary semi-finished product 20 so that at least one side surface of the preliminary semi-finished product 20 forms the texture or graphic mark 14 of the metal product when the preliminary semi-finished product 20 is processed by the secondary fine-molding cutting die 200.

Illustratively, the third press mold 210 and the fourth press mold 220 are respectively provided with a plurality of texture or image-text mark forming portions 260 on the sides facing the fourth press mold 220 and the third press mold 210, and referring to fig. 5B again, a texture or image-text mark forming portion 260 is respectively provided between adjacent second cutting edges 240 and adjacent third cutting edges 250, and when the preform 20 is processed by the secondary fine-molding cutting mold 200, the texture or image-text mark forming portions 260 can press the preform 20, so that the texture or image-text mark 14 of the metal product is respectively formed on the two side surfaces of the preform 20.

Optionally, the texture or print forming portion 260 on the third press mold 210 is symmetrical to the texture or print forming portion 260 on the fourth press mold 220, so that the textures formed on both side surfaces of the preliminary product 20 are symmetrical; of course, the texture or print forming portion 260 on the third press mold 210 and the texture or print forming portion 260 on the fourth press mold 220 may also be asymmetric.

The metal product shown in fig. 2A can be obtained by processing the primary semi-finished product 20 by the secondary fine-shaping cutting die 200 shown in fig. 5A, and the metal product shown in fig. 2B can be obtained by processing the primary semi-finished product 20 by the secondary fine-shaping cutting die 200 shown in fig. 5B.

In addition, in some embodiments, after the primary semi-finished product 20 is placed in the secondary forming bin 230 of the secondary fine forming and cutting die 200 and is extruded and formed to obtain the metal product, the method further includes: the metal product is divided along the first V-groove 12 and the second V-groove 13 to obtain a plurality of sub-metal pieces 11 separated from each other. The segmentation can be performed manually or by simple tools.

Further, the embodiment of the present invention also provides a mold assembly for manufacturing the metal product of the first aspect, wherein the mold assembly includes a primary rapid prototyping cutting die 100 and a secondary fine prototyping cutting die 200.

The primary rapid prototyping cutting die 100 comprises a die frame 110, and a first press mold 120 and a second press mold 130 which are arranged on the die frame 110, wherein at least one of the first press mold 120 and the second press mold 130 is slidably arranged on the die frame 110, the first press mold 120 and the second press mold 130 are matched to form a primary prototyping bin 140, one side of the first press mold 120, which faces the second press mold 130, is provided with a plurality of first cutting edges 150 which are arranged at intervals, the first cutting edges 150 are conical and are positioned in the primary prototyping bin 140, the top of each first cutting edge 150 is a rounded corner, the height of each first cutting edge 150 is smaller than the thickness of the metal sheet 10, and the width of one side of each first cutting edge 150, which is close to the first press mold 120, is larger than the height of the first cutting edge 150.

The secondary fine forming cutting die 200 comprises a third press die 210 and a fourth press die 220 which are matched with each other, the third press die 210 and the fourth press die 220 are matched to form a secondary forming bin 230, one side of the fourth press die 220, which faces the third press die 210, is provided with a plurality of second cutting edges 240 which are arranged at intervals, the number of the second cutting edges 240 is equal to that of the first cutting edges 150, the second cutting edges 240 are conical and are positioned in the secondary forming bin 230, the top of each second cutting edge 240 is a sharp corner, the precision of the sharp corner of each second cutting edge 240 is greater than or equal to 0.005mm, and is less than or equal to 0.02mm, the taper angle of the second cutting ridge 240 is equal to the taper angle of the first cutting ridge 150, the width of the side of the second cutting ridge 240 close to the fourth press-fit die 220 is equal to the width of the side of the first cutting ridge 150 close to the first press-fit die 120, and the width of the side of the second cutting ridge 240 close to the fourth press-fit die 220 is greater than the height of the second cutting ridge 240.

When the metal sheet 10 having a flat surface is placed in the primary molding bin 140 of the primary rapid prototyping cutting die 100 and is pressed, the first cutting ridge 150 can press the metal sheet 10 so that one side of the metal sheet 10 forms the primary V-groove 21, obtaining the primary semi-finished product 20.

When the primary semi-finished product 20 is placed into the secondary molding bin 230 of the secondary fine molding cutting die 200 and extruded, the plurality of second cutting ridges 240 correspondingly extrude the plurality of primary V-shaped grooves 21 on the primary semi-finished product 20, so that the plurality of primary V-shaped grooves 21 on the primary semi-finished product 20 form the first V-shaped grooves 12 of the metal product.

In some embodiments, the plurality of first cutting ribs 150 are evenly spaced on a side of the first clamping die 120 facing the second clamping die 130, and the plurality of second cutting ribs 240 are evenly spaced on a side of the fourth clamping die 220 facing the third clamping die 210.

In some embodiments, the taper angle of the first cutting edge 150 is greater than 60 degrees and less than or equal to 150 degrees.

In some embodiments, the apex of the second cutting ridge 240 is lower than the side surface 270 of the fourth press mold 220, and the distance between the apex of the second cutting ridge 240 and the side surface 270 of the fourth press mold 220 is 0.1mm or more and 0.3mm or less, the side surface 270 of the fourth press mold 220 is in abutting engagement with the side surface of the third press mold 210, and the secondary mold cartridge 230 is formed between the side of the fourth press mold 220 and the side of the third press mold 210.

In some embodiments, the metal sheet 10 is made of a noble metal.

In some embodiments, a plurality of third cutting edges 250 are arranged at intervals on one side of the third press-fit mold 210 facing the fourth press-fit mold 220, the number of the third cutting edges 250 is equal to that of the second cutting edges 240, the third cutting edges 250 are tapered and located in the secondary molding chamber 230, the vertex angle of the third cutting edge 250 is a precise vertex angle, the precision of the vertex angle of the third cutting edge 250 is greater than or equal to 0.005mm and less than or equal to 0.02mm, the vertex angle of the third cutting edge 250 is opposite to that of the second cutting edge 240, and the taper angle of the third cutting edge 250 is equal to that of the second cutting edge 240, when the primary semi-finished product 20 is put into the secondary molding cavity 230 of the secondary fine molding cutting die 200 and extruded, the third cutting edge 250 presses the side of the preliminary semifinished product 20 facing away from the preliminary V-groove 21, so that the preliminary semifinished product 20 forms the second V-groove 13 of the metal product.

In some embodiments, the height of the third cutting ridge 250 is lower than the height of the second cutting ridge 240.

In some embodiments, a plurality of third cutting ribs 250 are evenly spaced on a side of the third clamping die 210 facing the fourth clamping die 220.

In some embodiments, the taper angle of the third cutting edge 250 is greater than 60 degrees and less than or equal to 150 degrees.

In some embodiments, a side of the third press mold 210 facing the fourth press mold 220 and/or a side of the fourth press mold 220 facing the third press mold 210 is provided with a plurality of texture or print forming portions 260, and one texture or print forming portion 260 is provided between adjacent second cutting ribs 240 and/or between adjacent third cutting ribs 250, respectively.

In some embodiments, the texture or print forming portion 260 on the third press mold 210 and the texture or print forming portion 260 on the fourth press mold 220 are symmetrical to each other and the texture or print forming portion 260 can press the preform 20 such that the texture or print 14 of the metal product is formed on both side surfaces of the preform 20.

The structure of the mold assembly according to the embodiments of the present invention can be explained and illustrated with reference to the corresponding parts in the above embodiments, and the details are not repeated herein.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A metal article, characterized in that it comprises:

the metal body (1) is uniformly divided into a plurality of sub-metal blocks (11) in a preset shape, and the sub-metal blocks (11) are in an array shape;

the adjacent sub-metal blocks (11) are connected, and a first V-shaped groove (12) is formed at the connection position of the adjacent sub-metal blocks (11);

wherein the first V-shaped groove (12) is provided with sharp corners and a calibrated pattern.

2. The metal product according to claim 1, characterized in that the apex angle of the first V-groove (12) is a sharp angle, the precision of the sharp angle of the first V-groove (12) being greater than or equal to 0.005mm and less than or equal to 0.02 mm; and/or the presence of a gas in the gas,

the vertex angle bisector of the first V-shaped groove (12) is perpendicular to the bottom surface of the sub-metal block (11), and the vertex angle of the first V-shaped groove (12) is larger than 60 degrees and smaller than or equal to 150 degrees; and/or the presence of a gas in the gas,

the opening width of the first V-shaped groove (12) is greater than or equal to the depth of the first V-shaped groove (12); and/or the presence of a gas in the gas,

the vertical distance from the top point of the first V-shaped groove (12) to the bottom surface of the sub metal block (11) is greater than or equal to 0.1mm and less than or equal to 0.3 mm.

3. A metal product according to claim 1 or 2, characterized in that the shape of a plurality of said sub-metal blocks (11) is identical.

4. A metal product according to claim 3, characterized in that the shape of the sub-metal block (11) is rectangular or rhomboidal or triangular.

5. The metal product according to claim 1, characterized in that the sub-metal blocks on both sides of the first V-groove (12) are forced to separate the adjacent sub-metal blocks (11) along the first V-groove, and the error between the weight of the sub-metal blocks (11) after separation and the nominal weight is less than or equal to +0.01g and greater than or equal to-0.01 g.

6. The metal product according to claim 1, characterized in that the other side of the junction of adjacent sub-metal blocks (11) forms a second V-shaped groove (13), the vertex angle of the second V-shaped groove (13) is a sharp angle, and the precision of the sharp angle of the second V-shaped groove (13) is greater than or equal to 0.005mm and less than or equal to 0.02 mm;

the vertex angle of the first V-shaped groove (12) is opposite to the vertex angle of the second V-shaped groove (13).

7. Metal article according to claim 6, characterised in that the depth of the first V-grooves (12) is greater than the depth of the second V-grooves (13); and/or

The vertex angle bisector of the second V-shaped groove (13) is perpendicular to the bottom surface of the sub metal block (11), and the vertex angle of the second V-shaped groove (13) is larger than 60 degrees and smaller than or equal to 150 degrees; and/or the presence of a gas in the gas,

the opening width of the second V-shaped groove (13) is greater than or equal to the depth of the second V-shaped groove (13); and/or the distance between the vertex of the first V-shaped groove (12) and the vertex of the second V-shaped groove (13) is greater than or equal to 0.1mm and less than or equal to 0.3 mm.

8. A metal product according to claim 1, characterized in that at least one side of each said sub-metal block (11) is provided with a texture or graphic print (14).

9. Metal product according to claim 8, characterized in that each sub-block (11) is provided on both sides with a texture or graphic print (14), respectively.

10. The metal product of claim 1, wherein the metal product is a noble metal.

11. A die assembly for manufacturing a metal product according to claim 1, characterized in that the die assembly comprises a primary rapid prototyping cutting die (100) and a secondary fine prototyping cutting die (200) block;

wherein, first rapid prototyping cutting die (100) include framed (110), locate first die pressing mould (120) and second die pressing mould (130) on framed (110), first die pressing mould (120) with at least one in second die pressing mould (130) slides and locates on framed (110), just first die pressing mould (120) with second die pressing mould (130) cooperation forms first shaping storehouse (140), first die pressing mould (120) orientation one side of second die pressing mould (130) is equipped with first cutting arris (150) that a plurality of intervals were arranged, first cutting arris (150) are the taper and are located in first shaping storehouse (140), the top of first cutting arris (150) is the fillet, just the height of first cutting arris (150) is less than the thickness of sheet metal (10), first cutting arris (150) are close to the width of one side of first die pressing mould (120) is greater than the width of first cutting arris (150) A height;

the secondary fine forming cutting die (200) comprises a third press die (210) and a fourth press die (220) which are matched with each other, the third press die (210) and the fourth press die (220) are matched to form the secondary forming bin (230), one side, facing the third press die (210), of the fourth press die (220) is provided with a plurality of second cutting edges (240) which are arranged at intervals, the number of the second cutting edges (240) is equal to that of the first cutting edges (150), the second cutting edges (240) are conical and are positioned in the secondary forming bin (230), the tops of the second cutting edges (240) are sharp corners, the precision of the sharp corners of the second cutting edges (240) is larger than or equal to 0.005mm and smaller than or equal to 0.02mm, the conical angles of the second cutting edges (240) are equal to that of the first cutting edges (150), and the width, close to one side of the fourth press die (220), of the second cutting edges (240) is equal to that of the first cutting edges (150), and the width of the second cutting edges (240) is equal to that of the first cutting edges (150) The width of one side close to the first press mold (120) is equal in size, and the width of one side of the second cutting edge (240) close to the fourth press mold (220) is larger than the height of the second cutting edge (240);

when a standard metal sheet (10) with a flat surface is placed into a primary forming bin (140) of a primary rapid forming cutting die (100) and extruded, the first cutting edge (150) can extrude the metal sheet (10) to enable one side of the metal sheet (10) to form a primary V-shaped groove (21) and obtain a primary semi-finished product (20);

when the primary semi-finished product (20) is placed in a secondary forming bin (230) of a secondary fine forming cutting die (200) block and extruded, the plurality of second cutting edges (240) correspondingly extrude the plurality of primary V-shaped grooves (21) on the primary semi-finished product (20), so that the plurality of primary V-shaped grooves (21) on the primary semi-finished product (20) form first V-shaped grooves (12) of the metal product.

12. The mold assembly of claim 11, wherein a plurality of the first cutting ridges (150) are evenly spaced on a side of the first clamping die (120) facing the second clamping die (130), and a plurality of the second cutting ridges (240) are evenly spaced on a side of the fourth clamping die (220) facing the third clamping die (210).

13. The die assembly of claim 11 or 12, wherein the first cutting edge (150) has a taper angle greater than 60 degrees and less than or equal to 150 degrees.

14. The mold assembly of claim 11, wherein the apex of the second cutting ridge (240) is lower than the side surface (270) of the fourth press mold (220) and the distance between the apex of the second cutting ridge (240) and the side surface (270) of the fourth press mold (220) is 0.1mm or greater and 0.3mm or less, the side surface (270) of the fourth press mold (220) is in abutting engagement with the side surface of the third press mold (210), and the secondary molding cavity (230) is formed between the side of the fourth press mold (220) and the side of the third press mold (210).

15. The mold assembly according to claim 11, wherein a side of the third press mold (210) facing the fourth press mold (220) is provided with a plurality of spaced third cutting edges (250), the number of the third cutting edges (250) is equal to the number of the second cutting edges (240), the third cutting edges (250) are conical and are located in the secondary molding chamber (230), the vertex angle of the third cutting edges (250) is a sharp angle, the precision of the vertex angle of the third cutting edges (250) is greater than or equal to 0.005mm and less than or equal to 0.02mm, the vertex angle of the third cutting edges (250) is opposite to the vertex angle of the second cutting edges (240), and the cone angle of the third cutting edges (250) is equal to the size cone angle of the second cutting edges (240);

when the primary semi-finished product (20) is placed into a secondary forming bin (230) of a secondary fine forming cutting die (200) block and extruded, the third cutting edge (250) correspondingly extrudes one side of the primary semi-finished product (20) which is far away from the primary V-shaped groove (21), so that a second V-shaped groove (13) of the metal product is formed on the primary semi-finished product (20).

16. The die assembly of claim 15, wherein the third cutting edge (250) has a height that is lower than a height of the second cutting edge (240); and/or the presence of a gas in the gas,

the third cutting edges (250) are uniformly arranged at intervals on one side, facing the fourth press mold (220), of the third press mold (210); and/or the presence of a gas in the gas,

the third cutting edge (250) has a taper angle greater than 60 degrees and less than or equal to 150 degrees.

17. Mould assembly according to claim 16, wherein the side of the third press nip (210) facing the fourth press nip (220) and/or the side of the fourth press nip (220) facing the third press nip (210) is provided with a plurality of texture or graphic print forming portions (260), one texture or graphic print forming portion (260) being provided between adjacent second cutting edges (240) and/or between adjacent third cutting edges (250), respectively.

18. The mold assembly of claim 17, wherein a side of the third press mold (210) facing the fourth press mold (220) and a side of the fourth press mold (220) facing the third press mold (210) are provided with a plurality of texture or graphic print forming portions (260), respectively;

the texture or graphic print forming part (260) is capable of pressing the elementary semi-finished product (20) so that the two side surfaces of the elementary semi-finished product (20) respectively form the texture or graphic print (14) of the metal product.

19. The die assembly of claim 11, wherein the metal sheet (10) is a precious metal.